Damage evolution and removal behaviors of GaN crystals involved in double-grits grinding

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外文摘要：Elucidating the complex interactions between the work material and abrasives during grinding of gallium nitride(GaN)single crystals is an active and challenging research area.In this study,molecular dynamics simulations were performed on double-grits interacted grinding of GaN crystals;and the grinding force,coefficient of friction,stress distribution,plastic damage behaviors,and abrasive damage were systematically investigated.The results demonstrated that the interacted distance in both radial and transverse directions achieved better grinding quality than that in only one direction.The grinding force,grinding induced stress,subsurface damage depth,and abrasive wear increase as the transverse interacted distance increases.However,there was no clear correlation between the interaction distance and the number of atoms in the phase transition and dislocation length.Appropriate interacted distances between abrasives can decrease grinding force,coefficient of friction,grinding induced stress,subsurface damage depth,and abrasive wear during the grinding process.The results of grinding tests combined with cross-sectional transmission electron micrographs validated the simulated damage results,i.e.amorphous atoms,high-pressure phase transition,dislocations,stacking faults,and lattice distortions.The results of this study will deepen our understanding of damage accumulation and material removal resulting from coupling between abrasives during grinding and can be used to develop a feasible approach to the wheel design of ordered abrasives.

外文关键词：

grindingdouble-gritsmolecular dynamicsdamagematerial removalgallium nitride

作者：

Chen Li、Yuxiu Hu、Zongze Wei、Chongjun Wu、Yunfeng Peng、Feihu Zhang、Yanquan Geng

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作者单位：

State Key Laboratory of Robotics and System(HIT),Harbin Institute of Technology,Harbin 150001,People's Republic of China

Key Laboratory of Microsystems and Microstructures Manufacturing(HIT),Harbin Institute of Technology,Harbin 150001,People's Republic of China

College of Mechanical Engineering,Donghua University,Shanghai 201620,People's Republic of China

Department of Mechanical and Electrical Engineering,Xiamen University,Xiamen 361005,People's Republic of China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Heilongjiang Province of ChinaSelf-Planned Task of State Key Laboratory of Robotics and System(HIT)China Postdoctoral Science FoundationYoung Elite Scientists Sponsorship Program by CASTState Key Laboratory of Robotics and System(HIT)Open Fund of Key Laboratory of Microsystems and Microstructures Manufacturing(HIT)Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

项目编号：

523754205200513451675453YQ2023E014SKLRS202214B2022T150163YESS20220463SKLRS-2022-ZM-142022KM004HIT.OCEF.2022024FRFCU5710051122

出版年：

2024

DOI：

10.1088/2631-7990/ad207f

极端制造(英文)

CSTPCDEI

ISSN：

年,卷(期)：2024.6(2)